CN109751022A - A kind of note gas production method of connected well salt hole air reserved storeroom - Google Patents
A kind of note gas production method of connected well salt hole air reserved storeroom Download PDFInfo
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- CN109751022A CN109751022A CN201910084816.XA CN201910084816A CN109751022A CN 109751022 A CN109751022 A CN 109751022A CN 201910084816 A CN201910084816 A CN 201910084816A CN 109751022 A CN109751022 A CN 109751022A
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Abstract
The present invention relates to a kind of note gas production methods of connected well salt hole air reserved storeroom, comprising: is divided into the connected well of connected well salt hole air reserved storeroom: note gas recovery well, note row's halogen well；In gas storage gas injection, natural gas injects gas storage by note gas recovery well, and natural gas from top to bottom drives brine, and the brine in gas storage is discharged by note row's halogen well；In gas storage gas production, brine injects gas storage by note row's halogen well, and brine from bottom to top drives natural gas, and the natural gas in gas storage passes through note gas recovery well extraction；In gas storage neither gas injection nor gas production, a certain amount of natural gas is reserved in gas storage, and fresh water or light salt brine are injected by gas storage by note gas recovery well, form brine after fresh water or light salt brine dissolution rock salt, brine is discharged by note row's halogen well.The present invention solves the problems such as salt hole air reserved storeroom cavity volume easily reduces, rebasing gas accounting is big and the construction period is long, realizes the safe and efficient operation of connected well salt hole air reserved storeroom.
Description
Technical field
The present invention relates to a kind of note gas production methods of connected well salt hole air reserved storeroom, belong to natural gas storing field and salt mineral water
Molten field of mining.
Background technique
Currently, " adopt halogen and make chamber " and " note fells and transports row " of salt hole air reserved storeroom is latter two first different stage, that is, put into
After note fells and transports row, chamber is made with regard to no longer carrying out adopting halogen.And received concentration by brine digestion power and brine and limited, it is made adopting halogen
The chamber stage usually requires to take a substantial amount of time, and builds 200,000 m3Above salt hole air reserved storeroom generally requires 3 years or more
Time, which carries out adopting halogen, makes chamber, this makes the construction period of salt hole air reserved storeroom usually all longer.
Salt hole air reserved storeroom mostly uses individual well single tube structure, i.e. a well is only arranged in the salt cave of natural gas-storing, in the well only
Piece casing injected for natural gas with extraction of installation.Since rock salt has creep properties, in salt hole air reserved storeroom operational process
In, with the injection and extraction of natural gas, the pressure in gas storage, which will appear, to be widely varied, it may appear that salt cave volume-diminished is asked
Topic.The excessive mechanical property that will lead to gas storage of volume contraction is deteriorated or even meeting occurrence risk, while can also reduce gas storage
Gas storage capability, and then influence the economic benefit of gas storage.
In salt hole air reserved storeroom operational process, generally require there are a large amount of rebasing gas, it is total that rebasing tolerance accounts for about gas storage
40% or so of storage capacity.During salt hole air reserved storeroom operation, rebasing gas can not usually be produced.A large amount of rebasing gas stay in gas storage
It is interior, gas storage capital investment is not only increased, the service efficiency of gas storage is also reduced.
In conclusion salt hole air reserved storeroom is there are the construction period, long, salt cave volume easily reduces and the problems such as rebasing gas accounting is big,
It builds and runs to salt hole air reserved storeroom and bring detrimental effect.
Summary of the invention
The present invention provides a kind of note gas production method of connected well salt hole air reserved storeroom, by salt hole air reserved storeroom operation with adopt halogen and make
Chamber organically combines, and salt hole air reserved storeroom can be made to put into note gas production operation early, solve volume contraction between the salt hole air reserved storeroom runtime
Problem, while the rebasing tolerance of gas storage is also reduced, improve the utilization efficiency of salt hole air reserved storeroom.
The present invention relates to a kind of note gas production methods of connected well salt hole air reserved storeroom, method includes the following steps:
(1) connected well of connected well salt hole air reserved storeroom is divided into: note gas recovery well, note row's halogen well, wherein being set in note gas recovery well
It sets injection-production column jacket, make lumen column, setting note row's halogen tubing string in note row's halogen well；The lumen column of making of note gas recovery well is located in injection-production column jacket
Portion makes nozzle (such as, preferably 20- 10-40m lower than the nozzle of injection-production column jacket of the nozzle position of lumen column lower than injection-production column jacket
30m)；
(2) natural gas is injected by infusing the injection-production column jacket of gas recovery well and/or making lumen column in gas storage gas injection section
Into connected well salt hole air reserved storeroom, the brine in connected well salt hole air reserved storeroom arranges the discharge of halogen tubing string by the note of note row's halogen well；
(3) in the gas storage gas production stage, halogen tubing string is arranged by the note of note row's halogen well, brine such as saturated bittern injection is connected
In drifting salt hole air reserved storeroom, natural gas by note gas recovery well injection-production column jacket and/or make lumen column produce；
(4) wait infuse when making lumen column without natural gas extraction of gas recovery well, lumen column and/or note row are made by note gas recovery well
The note of halogen well arranges halogen tubing string, brine such as saturated bittern is injected into molten chamber, natural gas is adopted by the injection-production column jacket of note gas recovery well
Out；
(5) in gas storage packing stage, the stage neither gas injection nor gas production makes lumen column by note gas recovery well, will
Fresh water or light salt brine (NaCl content is 1-220g/L) are injected into molten chamber, and brine is discharged by note row's halogen tubing string of note row's halogen well.
Wherein, gas storage packing stage (5) can be carries out after step (2), or can be in step (3) or step
(4) it is carried out after.
In general, the caliber of injection-production column jacket is 150~300mm, injection-production column jacket nozzle position is on note gas recovery well molten chamber chamber top
Within lower 5m；The caliber for making lumen column is 80~200mm, and the shaft bottom for making the nozzle distance note gas recovery well of lumen column is 2~50m；
The caliber of note row's halogen tubing string is 100~250mm, and the shaft bottom of nozzle distance note row's halogen well of note row's halogen tubing string is 2~30m.
Further, the connected well in the application is by two mouthfuls or two mouthfuls or more of connection well construction, adjacent two mouthfuls of salt well wells
The distance of mouth is 100-300m, and preferably 150-250m, there are communicating passages for the bottom of connected well.Generally, exist in communicating passage
Solid particle, solid particle are the insoluble matter or indissoluble object in halite bed, main component are as follows: calcium sulfate, calcium carbonate, hydrogen-oxygen
Change magnesium and indissoluble or sl. sol. silicate etc., is filled there are hole between solid particle and by brine.With two mouthfuls or more
In the case where connected well, note gas recovery well can be flatly or multiple wells, note row halogen well can be a bite or multiple wells.Every mouthful of note is adopted
The molten cavity volume of gas well is ten thousand m of 15-503, the thickness at the top of molten chamber chamber top to salt deposit is in 50m or more.
Further, in step (1), the cavity position of note row's halogen well is lower than the cavity position of note gas recovery well, such as infuses
The chamber top position for arranging halogen well is 100-300m lower than the chamber top position for infusing gas recovery well, and preferably 150-250m infuses the height of the molten chamber of gas recovery well
Diameter ratio (i.e. " molten chamber height: molten chamber maximum gauge ") is 2~6, preferably 3~5.
Further, in step (2), in gas storage gas injection section, using the injection-production column jacket for infusing gas recovery well and lumen is made
Column, while natural gas being injected in gas storage；The natural gas that brine in note gas recovery well is injected from top to bottom gradually is replaced, is driven
It catches up with, brine passes through note row's halogen tubing string discharge by note row's halogen well via communicating passage.
Further, in step (2), when completing gas storage gas injection, the interface of natural gas and brine connects in connected well
The top of circulation passage, general gas-water interface 2-30m, preferably 4~20m above connected well communicating passage.
Further, in step (3), halogen tubing string is arranged by the note of note row's halogen well, the preferred saturated bittern of brine is injected
In gas storage, the preferred saturated bittern of brine enters the note molten chamber of gas recovery well via communicating passage；The brine that natural gas is injected is for example
Saturated bittern is gradually replaced from bottom to top, is driven, and by injection-production column jacket and/or makes the discharge of lumen column by note gas recovery well.
Further, in step (3), (4), when lumen column tube mouth is made in note gas recovery well in the interface of natural gas and brine
When lower section, natural gas is produced by the injection-production column jacket of note gas recovery well with lumen column is made；When the interface of natural gas and brine is in note gas production
When well makes the top of lumen column tube mouth, natural gas is only from the injection-production column jacket extraction of note gas recovery well.
Further, in step (5), natural gas forms air cushion layer above lumen column tube mouth in making for gas recovery well of note, hinders
Only molten on cavity, the thickness of air cushion layer is generally in 1-10m, preferably 2-5m；After fresh water or light salt brine are injected into the molten chamber of gas recovery well,
By side dissolution rock salt, continues to adopt halogen and make chamber, increase the molten cavity volume of gas storage.
After salt hole air reserved storeroom delivers note gas production operation, utilization " brine " is replaced mutually with " natural gas ", by gas storage
Operation pressure stabilization in a reasonable interval, pressure oscillation control within+- 5%, the ground of gas storage can be significantly improved
Matter stability.At the same time it can also improve the recovery ratio of gas storage natural gas, the natural gas of extraction accounts for gas storage storage capacity
60vol%-100vol%, preferably 80vol%-90vol%.
Heretofore described " salt cave ", " cavity ", which refer to be formed by after well mine salt solution mining, adopts the molten chamber of salt, with " salt
Chamber ", " molten chamber ", " well chamber " are mutually used.
The present invention has the following technical effects or advantage:
1, the present invention significantly improves the ground of gas storage by the operation pressure stabilization of salt hole air reserved storeroom in a reasonable interval
Matter stability slows down salt cave volume-diminished.
2, gas storage note gas production method provided by the invention can reduce the rebasing tolerance of gas storage, both reduce gas storage
Capital investment also improves the service efficiency of gas storage.
3, the present invention can continue to adopt halogen during gas storage operation makes chamber, so that salt hole air reserved storeroom puts into fortune early
Row, shortens the construction period of gas storage.
Detailed description of the invention
Fig. 1 is 2 mouthfuls of connected well salt hole air reserved storeroom gas injection section process schematic representations；
Fig. 2 is 2 mouthfuls of connected well salt hole air reserved storeroom gas production stage process schematic diagrames；
Fig. 3 is 2 mouthfuls of connected well salt hole air reserved storeroom packing stage process schematic representations；
Fig. 4 is 2 mouthfuls or more connected well salt hole air reserved storeroom gas injection section process schematic representations, is illustrated by taking 3 mouthfuls of salt wells as an example；
Fig. 5 is 2 mouthfuls or more connected well salt hole air reserved storeroom gas production stage process schematic diagrames, is illustrated by taking 3 mouthfuls of salt wells as an example；
Fig. 6 is 2 mouthfuls or more connected well salt hole air reserved storeroom packing stage process schematic representations, is illustrated by taking 3 mouthfuls of salt wells as an example；
Wherein, 1 is note gas recovery well, and 2 be note row's halogen well, and 3 be natural gas, and 4 be brine, and 5 be injection-production column jacket, and 6 be to make lumen
Column, 7 be note row's halogen tubing string, and 8 be connected well communicating passage, and 9 be fresh water or light salt brine.
Specific embodiment
In order to further appreciate that the present invention, the present invention is further elaborated with reference to embodiments, but not
Limitation of the present invention, it should be understood that these descriptions are intended merely to further illustrate the features and advantages of the present invention, rather than right
The limitation of the claims in the present invention.All equivalent replacements according to any this field made by the disclosure of invention belong to this
The protection scope of invention.
Embodiment 1
In rock salt mining area, using even 1, even 2 two mouthfuls of connected wells, complete salt hole air reserved storeroom and build, two mouthfuls of salt well well heads away from
From for 220m；1 well of the company of selection is infuses gas recovery well, and even 2 wells are as note row's halogen well；Even 1 well can be used for the molten cavity of natural gas-storing
Product is 400,000 m3, molten chamber maximum gauge is 65m, and molten chamber depth bounds are 1080-1280m；Even the depth bounds of the molten chamber of 2 wells are
1270-1280m；The depth bounds of communicating passage 8 are 1280-1290m.
Lumen column 6 is made in the injection-production column jacket 5 even in 1 equipped with Φ 177.8mm, the Φ 114.3mm that is inserted in injection-production column jacket,
Underground injection-production column jacket 5 and the nozzle distance for making lumen column 6 are 28m；Even the note equipped with Φ 177.8mm arranges halogen tubing string 7 in 2 wells.
Gas injection section (as shown in Figure 1), by the even injection-production column jacket of 1 well and lumen column is made, while natural gas being injected
Into gas storage, even the molten intracavitary brine of 1 well is from top to bottom gradually replaced by natural gas, is driven, through communicating passage by even 2 wells
Note row's halogen tubing string 7 is discharged；When gas-water interface is at 1265m, gas storage stops gas injection.
Gas production stage (as shown in Figure 2), halogen tubing string 7 is arranged by the note of even 2 wells and injects saturated bittern in storage cavern, saturation
Brine enters the even molten chamber of 1 well via communicating passage；The saturated bittern that natural gas is injected gradually is replaced from bottom to top, is driven, and
It is produced by connecting the injection-production column jacket 5 of 1 well and making lumen column 6.When making lumen column 6 without natural gas extraction, pass through even 1 well when even 1 well
Make lumen column 6, saturated bittern is injected into molten chamber, natural gas is produced by the even injection-production column jacket 5 of 1 well.It is reserved about in even 1 well
The natural gas of 4m thickness.
Packing stage (as shown in Figure 3), i.e. the stage neither gas injection nor gas production makes lumen column 6 by even 1 well
Light salt brine (NaCl content is 20g/L) is injected into molten chamber, brine is discharged by even 2 wells.It is molten by side in the even molten chamber of 1 well
Chamber is made to continue to adopt halogen, adopts 210,000 m of halogen in 1 year altogether3, newly increase about 20,000 m3Molten cavity volume.
During salt hole air reserved storeroom operation, the three phases such as gas injection, gas production, pressure maintaining circulation is carried out, the molten intracavitary pressure in underground
Power is stablized in 14.5 ± 0.5MPa.
Embodiment 2
It completes salt hole air reserved storeroom using three mouthfuls of connected wells such as even 1, even 2 and even 3 in rock salt mining area and builds, adjacent two mouthfuls of salt
The distance of well well head is 200m；The company of selection 1 and even 3 wells is infuse gas recovery well, and even 2 wells are as note row's halogen well；Wherein connect 1 and even 3 wells
Molten chamber total volume be 700,000 m3, the maximum gauge of molten chamber is 70m, and the molten chamber depth bounds of two mouthfuls of salt wells are 1100-1300m；
Even the molten cavity volume of 2 wells is 20,000 m3, molten chamber depth bounds are 1275-1300m；The depth bounds of communicating passage 8 are 1300-
1312m。
Connecting 1, connecting making for the injection-production column jacket 5, the Φ 114.3mm being inserted in injection-production column jacket for being equipped with Φ 177.8mm in 3 wells
Lumen column 6, underground injection-production column jacket and the nozzle distance for making lumen column are 30m；Even the note equipped with Φ 177.8mm arranges halogen pipe in 2 wells
Column 7.
Gas injection section (as shown in Figure 4), by connecting 1, the even injection-production column jacket 5 of 3 wells and making lumen column 6, while will be natural
Gas is injected into gas storage, and company 1, even the molten intracavitary brine of 3 wells is from top to bottom gradually replaced by natural gas, driven, logical through being connected to
Road is discharged by note row's halogen tubing string 7 of even 2 wells；When gas-water interface is at 1280m, gas storage stops gas injection.
Gas production stage (as shown in Figure 5), halogen tubing string 7 is arranged by the note of even 2 wells, saturated bittern is injected in storage cavern, is satisfied
The molten chamber for entering company 1 via communicating passage with brine, connecting 3 wells；The saturated bittern that natural gas is injected from bottom to top gradually replace,
It drives, and is produced by connecting 1, the even injection-production column jacket 5 of 3 wells and making lumen column 6.Lumen column 6 is made without Gas Exploitation to even 1,3 wells of company
When out, by even 1, even 3 wells make lumen column 6, and saturated bittern is injected into molten chamber, and natural gas is by even 1, even the note of 3 wells is adopted
Tubing string 5 produces.In company 1, even 3 wells reserve the natural gas of 3m thickness.
Packing stage (as shown in Figure 6), i.e. the stage neither gas injection nor gas production makes lumen by even 1,3 wells of company
Fresh water is injected into molten chamber by column 6, and brine is discharged by even 2 wells.It makes in chamber connecting 1, connecting 3 wells, is made by the way that side is molten to continue to adopt halogen
Chamber adopts 260,000 m of halogen altogether in 1 year3, newly increase about 2.5 ten thousand m3Molten cavity volume.
During salt hole air reserved storeroom operation, the three phases such as gas injection, gas production, pressure maintaining circulation is carried out, the molten intracavitary pressure in underground
Power is stablized in 15 ± 0.5MPa.
Claims (10)
1. a kind of note gas production method of connected well salt hole air reserved storeroom, method includes the following steps:
(1) connected well of connected well salt hole air reserved storeroom is divided into note gas recovery well and note row's halogen well, wherein setting note in note gas recovery well
It adopts tubing string, make lumen column, setting note row's halogen tubing string in note row's halogen well；The lumen column of making of note gas recovery well is located inside injection-production column jacket,
The nozzle position for making lumen column is lower than the nozzle of injection-production column jacket；
(2) pass through the injection-production column jacket of note gas recovery well and/or make lumen column, natural gas is injected into gas storage and is stored, gas storage
In brine by note row halogen well discharge, realize gas storage gas injection；
(3) by note row halogen well note arrange halogen tubing string by brine inject gas storage in, natural gas by note gas recovery well injection-production column jacket
And/or the extraction of lumen column is made, realize gas storage gas production；
(4) wait infuse when making lumen column without natural gas extraction of gas recovery well, lumen column and/or note row's halogen well are made by note gas recovery well
Note arrange halogen tubing string, brine is injected into the molten chamber of gas storage, natural gas by note gas recovery well injection-production column jacket produce；
(5) in gas storage packing stage, neither gas injection nor gas production at this stage, the lumen column of making by infusing gas recovery well will be light
Water or light salt brine are injected into molten chamber, and brine is discharged by note row's halogen tubing string of note row's halogen well；
Preferably, gas storage packing stage (5) is carried out after the step (2), or in the laggard of step (3) or step (4)
Row.
2. note gas production method according to claim 1, wherein in step (1), connected well salt hole air reserved storeroom by two mouthfuls or
Two mouthfuls or more of connection well construction, the distances of adjacent two mouthfuls of salt well well heads are 100-300m, preferably 150-250m, between connected well
Bottom have communicating passage be interconnected, make lumen column nozzle position be lower than injection-production column jacket nozzle 10-40m, preferably 20-
30m。
3. note gas production method according to claim 1 or 2, wherein in step (1), the chamber top position ratio of note row's halogen well
Infuse the low 100-300m in chamber top position, preferably 150-250m of gas recovery well；As molten chamber height: the note of the ratio between molten chamber maximum gauge is adopted
The ratio of height to diameter of the molten chamber of gas well is 2~6, preferably 3~5.
4. note gas production method according to claim 1, wherein in step (2), utilize the injection-production column jacket of note gas recovery well
And/or lumen column is made, while natural gas being injected in gas storage；The natural gas that brine in gas storage is injected from top to bottom by
It gradually replaces, drive, via the communicating passage between connected well by note row's halogen tubing string discharge of note row's halogen well.
5. note gas production method according to claim 1, wherein in step (2), when completing gas storage gas injection, naturally
The interface of gas and brine 2-30m, preferably 4~20m above connected well communicating passage, molten chamber of the natural gas storing in note gas recovery well
In.
6. note gas production method according to claim 1, wherein in step (3), arrange halogen tubing string by the note of note row's halogen well
Brine is injected in gas storage, brine enters the note molten chamber of gas recovery well via the communicating passage between connected well；Natural gas is injected
Brine gradually replace, drive from bottom to top, be discharged by note gas recovery well.
7. note gas production method according to claim 1, wherein in step (5), natural gas makes lumen note gas recovery well
Air cushion layer is formed above column tube mouth, prevent it is molten on cavity, air cushion layer with a thickness of 1-10m, preferably 2-5m.
8. note gas production method according to claim 1, wherein in step (5), fresh water or light salt brine are injected into note gas production
After the molten chamber of well, by side dissolution rock salt, continues to adopt halogen and make chamber, increase the cavity volume of gas storage.
9. note gas production method according to claim 1 to 8, which is characterized in that infused in connected well salt hole air reserved storeroom
During gas production is run, the fluctuation range of gas storage operating pressure is within upper and lower 5%.
10. note gas production method according to claim 1 to 9, which is characterized in that the natural gas of gas storage extraction
Account for the 60vol%-100vol% of gas storage storage capacity, preferably 80vol%-90vol%.
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